hide SkDevice::config()

src/gpu/SkGpuDevice.cpp

Index: src/gpu/SkGpuDevice.cpp
diff --git a/src/gpu/SkGpuDevice.cpp b/src/gpu/SkGpuDevice.cpp
index 59c078f398eb9baebd3b4337b783f91e544bdadb..add0fa744f09a4c3c66f193cb8f3b7ad2223e084 100644
--- a/src/gpu/SkGpuDevice.cpp
+++ b/src/gpu/SkGpuDevice.cpp
@@ -380,6 +380,7 @@ SK_COMPILE_ASSERT(SkShader::kLast_BitmapType == 6, shader_type_mismatch);
 
 ///////////////////////////////////////////////////////////////////////////////
 
+#ifdef SK_SUPPORT_LEGACY_DEVICE_CONFIG
 SkBitmap::Config SkGpuDevice::config() const {
     if (NULL == fRenderTarget) {
         return SkBitmap::kNo_Config;
@@ -388,6 +389,7 @@ SkBitmap::Config SkGpuDevice::config() const {
     bool isOpaque;
     return grConfig2skConfig(fRenderTarget->config(), &isOpaque);
 }
+#endif
 
 void SkGpuDevice::clear(SkColor color) {
     SkIRect rect = SkIRect::MakeWH(this->width(), this->height());